Comstock House

Enter Comstock House and get several lengthy cut-scenes and cinematic interactions. Booker is in no danger until he enters "In Her Loving Embrace" (the madhouse sanitarium), a part of the Comstock House. The chapter select menu may refer to that portion of the game as The Atrium due to all the stuff that happens (handy if you are playing on 1999 Mode and need to restart from a checkpoint). Just hop down to the ground (freight hook) and head into the house.

Note: Vending machines are non-existent in this, the Atrium, Warden's Office, and Operating Theater locales. If you haven't already learned how to combine your weapons, melee, and vigor skills effectively, you will.

1999 Mode Tips

Easy. Use possession on one of them and headshot them with a high powered gun (Hand Cannon, Carbine, Sniper Rifle, etc.) while they fight amongst themselves.

Command Deck - Defend a ship from a lot of enemies and three zeppelins

THE EXPLOIT

As you enter the second main room of the Comstock House in which you hear the cries of Elizabeth and may spot a few random people wandering around, pick up the Pistol in the northwest corner of the room if you're low on ammunition. Health can also be found here. After you've secured the pistol, walk on over toward your objective, and shoot the Boy of Silence. He's the freaky looking guy with the spotlight who's blocking your path. There's no way to avoid this fight, and without knowing this exploit, you might never make it past this point in the game.

Lure the enemies that the Boy of Silence will spring on you back into the larger room you came from. As you enter the room, turn to either the left or right, and hop over the guard rail just before the stairs. Stay on this platform, while walking closer to the entrance of the Comstock House. The enemies chasing you should now wrap around the stairs and stop just at your feet. At this location, they will be unable to attack you, yet you will be able to attack them.

An added benefit to this exploit is the use of melee to eliminate all of the enemies while conserving ammunition. You will be able to melee enemies from this location without being thrown at the enemies, due to the lip in the platform you're standing on preventing you from moving.

Alternatively, try using Bucking Bronco and your weapon. After alerting the Boy of Silence, funnel his minions into a cluster by heading to either side of the room, then use Bucking Bronco to lift them up. Go for those critical headshots as they are helplessly up. Wash. Rinse. Repeat.